adding support for appsumo codes

shared/schema/AppsumoCode.ts

@@ -0,0 +1,16 @@
+import { model, Schema, Types } from 'mongoose';
+
+export type TAppsumoCode = {
+    _id: Schema.Types.ObjectId,
+    code: string,
+    used_at: Date,
+    created_at?: Date,
+}
+
+const AppsumoCodeSchema = new Schema<TAppsumoCode>({
+    code: { type: String, index: 1 },
+    created_at: { type: Date, default: () => Date.now() },
+    used_at: { type: Date, required: false },
+});
+
+export const AppsumoCodeModel = model<TAppsumoCode>('appsumo_codes', AppsumoCodeSchema);